While we've resurrected this thread...

My Infrant X6 is now some nine months old and humming along nicely. Actually, it's humming noticably louder than the day I bought it (the fan now runs at 4300rpm rather than its original 3700-3900rpm) and Infrant is sending me a replacement fan, under warranty, to see if that addresses the problem. I have "rev A" box, and they've since gone to a completely different fan structure in the newer "rev B" boxes, although there's still quite a bit of agitation on the Infrant chat board, particularly with the "rev B" boxes.

Still, it's working like a champ, now happily storing my entire CD collection as Apple Lossless. With the latest SlimServer software, it even does the transcoding to WAV to support my SqueezeBox. Performance was marginal when I was using 100Mbit Ethernet and no battery backup. Notably, it was unable to deal with capturing video from my video camera through iMovie (DV video is something like 25Mbits). Now I've got GigE and battery backup and the performance is quite snappy. iMovie is now entirely happy to have all of its data on the file server.